I have codes p0138 and p0139 in addition to a P0430

Question

If I have p0139 p0138 P0430 what should I fix?

Answer 1

HI there,

The P0138 and 139 codes are for the rear O2 sensor. The P0420 is for the bank 1 catalytic converter below threshhold. This is the converter on the bank closest to the firewall. Also, there are service bulletins for 2 of the three codes. You will have to pay at the dealer to have them done, but it could save you some money.